In which situation can a security guard make an arrest?

A security guard can make an arrest if they witness a crime being committed and have the authority to do so. This is grounded in the concept of "private person's arrest," where individuals, including security personnel, have the legal right to detain someone who they see committing a crime. The key component of this situation is the direct observation of the criminal act, which legitimizes the guard's actions within the bounds of the law.

Additionally, security guards typically operate under specific departmental policies and state laws that outline their responsibilities and the limits of their authority. When witnessing a crime, they are often expected to take immediate action to ensure safety and uphold the law, provided they act within their training and the legal limitations set forth for their role.

This option reflects a clear understanding of the legal grounds for making an arrest, while the other choices do not align with the legal framework. For instance, suspicion alone without witnessing the act does not justify an arrest. Similarly, making an arrest based solely on someone's request or out of personal feelings of being threatened lacks the necessary legal basis. Hence, witnessing a crime is crucial in determining the validity of the guard's response.